Prepare a PDF for quick viewing on the web
Linearizing reorders the file so a browser can show the first page while the rest is still downloading. It also tidies the internal structure, all on your device.
- Files never leave your browser.
- No account needed
- No watermark added
- Works on any device
How it works
Step 1: Choose or drop the PDF you plan to publish.
Step 2: Select Web Optimize PDF.
Step 3: Download the optimized file.
Step 4: Upload it to your website or document library in place of the original.
What web optimizing a PDF does
A normal PDF keeps part of its index at the end of the file, so a viewer often needs to fetch the whole thing before it can show anything. Linearization, also called fast web view, rearranges the data so the first page and the information needed to display it come first. A viewer that requests the file in pieces can then paint page one right away while the other pages keep arriving.
The tool uses QPDF, compiled to WebAssembly so it runs in your browser, to linearize the file and compress its structure. This is about how the file is arranged, not how heavy its images are. Images are not recompressed, so the size usually changes only a little. To reduce weight, use Compress PDF first and optimize for the web as the final step.
Why use this tool
The first page appears sooner
Readers on slow connections see page one while later pages are still loading, instead of a blank viewer.
A tidier file structure
The internal structure is rewritten and compressed, which can trim a little size as a side effect.
Images stay exactly as they are
Nothing is recompressed, so photos and scans keep the quality they had.
Nothing is uploaded
The file is processed in your browser before you publish it anywhere.
Common uses
Product catalogues on a website
A 60-page catalogue linked from a shop page opens on its cover while the rest loads, so shoppers do not give up on a blank tab.
Long manuals on a support site
Users landing on a manual from a search result reach the first page quickly, even on a mobile connection.
Newsletters and reports linked from email
Readers opening a link on the go see the front page at once rather than waiting for the complete file.
Course material on a school platform
Lecture notes hosted on a learning site become quicker to start reading when students open them one after another.
When fast web view actually helps
The gain is largest when three things are true together: the file is big, the reader's connection is slow, and the file is opened straight in a browser rather than downloaded first. If any of these is missing, linearization changes little you can feel.
- Worth doing: large brochures, catalogues, manuals and reports meant to be read online.
- Not worth much: one-page forms and short letters, or files people will download to their device before opening.
- Best order of work: Compress PDF for weight, then Web Optimize PDF, then publish without re-saving.
- To confirm what you have, PDF Information shows details about a file before and after.
Supported formats
- Input
- PDF files (.pdf), up to 200 MB. Password-protected files should be unlocked first.
- Output
- One linearized PDF file with a compressed structure.
For heavy images, use Compress PDF before this step. To fix a file that will not open, use Repair PDF.
Good to know
- Images are not recompressed, so a heavy PDF will still be heavy. Use Compress PDF to reduce weight.
- The benefit depends on the server and the viewer. Fast web view works when the file is delivered in pieces on request; some viewers and hosts ignore it.
- On small files the difference is hard to notice, since they download almost instantly anyway.
- Editing or re-saving the file in another program can undo the linearization, so do this as the last step before publishing.
Your files never leave your browser
This tool runs entirely on your device using your browser. Your files are not uploaded to our servers and are not stored anywhere. Closing the tab discards everything.
Frequently asked questions
What does web optimizing a PDF mean?
It means linearizing the file, also called fast web view, so a viewer can display the first page before the whole file has downloaded. The content stays the same; only the order of the data changes.
Will it make my PDF smaller?
Only slightly, if at all. The internal structure is compressed, but images are not recompressed. Use Compress PDF when you need a real reduction in size.
Will the document look different afterwards?
No. Pages, text, fonts and images are unchanged. Only the internal arrangement of the file is different.
Is my file uploaded to be optimized?
No. QPDF runs as WebAssembly in your browser, so the file is processed on your device and not uploaded.
Do I need this for PDFs I send by email?
Usually not. Fast web view helps when a PDF is opened online in a browser. An attachment is downloaded in full before opening, so the benefit is small.